Air-pump



(No Model.)

B. P. GARSED.

AIR PUMP Patented Sept. 3, 1885.

I 'IIIIIIIIIIII I W /ne'sses:

UNITED STATES PA ENT OFFICE.

ROBERT P. GARSED, OF NORRISTOWN, PENNSYLVANIA.

AIR-PUMP. A

EwPECIPICA'I'ION forming part of Letters Patent No. 325,926, dated September 8, 1885.

Application filed July 3, 1885.

To all whom it may concern.-

Be it known that I, ROBERT P. GARSED, a citizen of the United States, and a resident of N orristown, Montgomery county, and State of Pennsylvania, have invented a new and useful Improvement in Air-Pumps, of which the following is a specification.

The object of my invention is to furnish an improved and reliable air-pump whose sim' plicity, compactness, and adaptability for forcing air through a pipe, mostly for bell-ringing, shall be its recommendation.

In the accompanying drawings, forming part of this specification, and in which similar letters of reference indicate like parts throughout the several views, Figure 1 represents a side sectional view of the device; Fig. 2, a side sectional view of a modification of the metal cup for holding the rubber air-container, and differs from Fig. 3 in that it has a peripheral channel uponits inside bottom, through which air may pass to pipe 0; Fig. 3, such metal cup with a flange by which the device may be additionally supported in place; Fig. 4:, a sectional view of the wooden cover with screwrim attached, which parts, when in place, are seen in Fig. 1. Fig. 5 represents a-section of a bone or wooden tip, G, which,when in place, fits over-top of metal plunger F. Fig. 6 is a section of this metal plunger with guide-stem attached, which stem fits within a correspondingly-shaped cavity through the center of screw shown in Fig. 1, and which-screw, as well, holds the pump in position in a desired place. Fig. 7 is a bottom view of pump with a crossplate adapted also, when desired, to hold the pump in place.

A, Figs. 1, 2, 3, and 7, represents a metal cup of suitable shape to contain ahollow flexible annulus-shaped aircontainer, B, through which there is a hole for the passage of air to the pipe or coupling 0, which in turn may be attached to a bell or other signaling device.

D is a screw, the under side of whose head,

abutting against top of central projection of cup A, holds the cup in place, and also affords support by stem E for the metal plunger F, which expels air from the container B.

H is awooden top or cover with central opening for passage of plunger-tip, and also with space out from its lower face to receive (No model.)

edges of screw-rim I (which is held by screws) and allows upwardly-curved face of plunger F to rest Within it when said ,wooden top, by screw-rim I,is held by threads to the metal cup A, as shown.

The pipe or coupling 0 has a shouldered end through cup A to within container B, and secures this pipe and container in place when required.

The operation of the device is as follows: It being in place upon a door, desk, or other suitable place, the tip G is pressed upon in the ordinary way by a persons thumb, with the effect that the air in the container B, by collapsion of container,is forcedto a desired place, the plunger F returning to its normal position by the elasticity of the rubber of which container B is made, the shape of inside of plunger F allowing the inside fold of container B and head of screw D to fit within it when the plunger is pressed fully downwardly, and thus, with screw D serving two purposes-holding the devicein place andsupporting plunger F- and the shape of plunger F, adapted to collapse the container and affording storageroom for parts of the apparatus on the inside and holding thumb-tip on the outside of no larger diameter than itself, and yet extending within it, whereby compactness and few parts are maintained, I claim the device as novel over my other patents.

The part of plunger Fto receive end of screw may be extended downwardly and used in heir of stem Eu The cross-plate shown in Fig. 7 may be either of metal or wood, and in shape a disk of larger diameter than cup A; and the screw D may either extend through or within it, for the purposes before mentioned. The center of this plate may also be projecting, to enter a wall or partition, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination, in an air-pump, a cup,A, an annulus-shaped flexible container, B, held Within said cup, a hollow screw, D, and a plunger with stem E, the screwD adapted to sup 7 port the device in place and guide the plunger in its motions, substantially as and for the pu rposes set forth.

IOO

2. In an air-pump, the combination of cup A, container B, held thereby, plunger F, with a projecting part adapted to hold a thumb-tip and afford room for end of screw D, said screw D, and the thumb-tip Gr, substantially as and 4. In an air-pump, the combination of metal cup A, rubber annulus-shaped container 13, held thereby, a plunger with projecting top, a screw adapted to hold the device in'place, the top or cover H, with central opening and with its threaded connections, and the coupling (J, extending within cup A and container 13, and serving as a means to convey air.

R. P. GARSED.

Witnesses:

WM. WAGNER, J r., JOEL H. DE, VICTOR. 

